Patents by Inventor Yumin Saigo

Yumin Saigo has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • LED drive circuit
    Patent number: 11785686
    Abstract: An LED drive circuit includes a power supply terminal, an LED, a first switch, and a first resistor are connected in series. The power supply terminal, a third resistor, and a second switch are connected in series. A connection point between the third resistor and the second switch, and a control terminal of the first switch are connected. A second resistor is connected between a connection point between the first switch and the first resistor, and a control terminal of the second switch. A first PTC thermistor is connected to a connection point between the control terminal of the second switch and the second resistor.
    Type: Grant
    Filed: October 19, 2021
    Date of Patent: October 10, 2023
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventor: Yumin Saigo
  • LED DRIVE CIRCUIT
    Publication number: 20220039232
    Abstract: An LED drive circuit includes a power supply terminal, an LED, a first switch, and a first resistor are connected in series. The power supply terminal, a third resistor, and a second switch are connected in series. A connection point between the third resistor and the second switch, and a control terminal of the first switch are connected. A second resistor is connected between a connection point between the first switch and the first resistor, and a control terminal of the second switch. A first PTC thermistor is connected to a connection point between the control terminal of the second switch and the second resistor.
    Type: Application
    Filed: October 19, 2021
    Publication date: February 3, 2022
    Inventor: Yumin SAIGO
  • Laminated PTC thermistor element
    Patent number: 9530547
    Abstract: A laminated PTC thermistor element that includes a ceramic substrate including a plurality of ceramic layers, a plurality of internal electrodes within the ceramic substrate, and external electrodes on the surface of the ceramic substrate that provide electrical conduction to the internal electrodes. The ceramic substrate is 0.3 [?m] or more and 1.2 [?m] or less in average porcelain grain size. Furthermore, the relative density of the ceramic substrate has a lower limit of 70 [%], and an upper limit of ?6.43d+97.83 [%] when the average porcelain grain size is denoted by d.
    Type: Grant
    Filed: December 10, 2014
    Date of Patent: December 27, 2016
    Assignee: MURATA MANUFACTURING CO., LTD.
    Inventors: Wataru Aoto, Yumin Saigo, Hayato Katsu, Yasuhiro Nabika
  • LAMINATED PTC THERMISTOR ELEMENT
    Publication number: 20150091690
    Abstract: A laminated PTC thermistor element that includes a ceramic substrate including a plurality of ceramic layers, a plurality of internal electrodes within the ceramic substrate, and external electrodes on the surface of the ceramic substrate that provide electrical conduction to the internal electrodes. The ceramic substrate is 0.3 [?m] or more and 1.2 [?m] or less in average porcelain grain size. Furthermore, the relative density of the ceramic substrate has a lower limit of 70 [%], and an upper limit of ?6.43d+97.83 [%] when the average porcelain grain size is denoted by d.
    Type: Application
    Filed: December 10, 2014
    Publication date: April 2, 2015
    Inventors: Wataru Aoto, Yumin Saigo, Hayato Katsu, Yasuhiro Nabika